package com.itheima.reggine.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggine.common.CustomException;
import com.itheima.reggine.entity.Category;
import com.itheima.reggine.entity.Dish;
import com.itheima.reggine.entity.Setmeal;
import com.itheima.reggine.mapper.CategogryMapper;
import com.itheima.reggine.service.CategoryService;
import com.itheima.reggine.service.DishService;
import com.itheima.reggine.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Runqiang Jiang
 * @create 2022/4/18 20:59
 */
@Service
@Slf4j
public class CategoryServiceImpl extends ServiceImpl<CategogryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    /**
     * 根据id删除分类，删除之前要进行判断
     * @param id
     */
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> dishqueryWrapper=new LambdaQueryWrapper<>();
        // 添加查询条件，根据分类id进行查询
        dishqueryWrapper.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dishqueryWrapper);
        //查询当前分类是否关联了菜品，如果已经关联，抛出一个业务异常
        if(count1>0){
            //已经关联菜品，抛出一个业务异常
            throw  new CustomException("当前分类项关联了菜品，不能删除");
        }
        //查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper=new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count2= setmealService.count(setmealLambdaQueryWrapper);
        if(count2>0){
            //已经关联套餐，抛出一个业务异常
            throw  new CustomException("当前分类项关联了套餐，不能删除");

        }
        //正常删除分类
        super.removeById(id);
    }
}